玻璃玻纤板块9月4日跌2.69%，中材科技领跌，主力资金净流出3.51亿元

Market Overview - On September 4, the glass and fiberglass sector declined by 2.69%, with China National Materials Technology leading the drop [1] - The Shanghai Composite Index closed at 3765.88, down 1.25%, while the Shenzhen Component Index closed at 12118.7, down 2.83% [1] Stock Performance - Key stocks in the glass and fiberglass sector showed varied performance, with Jin Jing Technology rising by 3.34% to close at 4.95, while China National Materials Technology fell by 5.82% to close at 31.05 [1][2] - The trading volume and turnover for major stocks included: - Jin Jing Technology: 383,600 shares, turnover of 188 million yuan - Kai Sheng New Energy: 60,500 shares, turnover of 66.09 million yuan - China National Materials Technology: 443,700 shares, turnover of 1.413 billion yuan [1][2] Capital Flow - The glass and fiberglass sector experienced a net outflow of 351 million yuan from institutional investors and 189 million yuan from retail investors, while retail investors saw a net inflow of 540 million yuan [2] - Specific stock capital flows indicated: - Jin Jing Technology: 12.77 million yuan net inflow from institutional investors - China National Materials Technology: 5.82% decline in share price with a significant turnover [2][3] Individual Stock Analysis - Notable individual stock movements included: - Kai Sheng New Energy: 677.16 million yuan net inflow from institutional investors - Longhai Co.: 1.83 million yuan net outflow from institutional investors [3] - The overall sentiment in the sector appears mixed, with some stocks attracting retail interest despite the overall decline [3]